Athletic males (N = 13) performed two trials of repeated modified Wingate Anaerobic Power Tests (6 x 15-sec with 45 seconds interval rest) one week apart. At the beginning, one week of familiarization trials were experienced. One hour before performing Ss ingested a placebo or a commercial energy drink (Red Bull™).

The drink condition significantly increased resting VO2, Ve, RER, heart rate, exercise heart rate, and post-exercise lactate. Exercise was not affected. There were no differences between the two conditions or trials 1-6 for peak power, total work, fatigue index, EPOC, and Total Fatigue Index.